Process for producing low viscosity isocyanate trimers

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

528497, 528502, 560352, C08F 600, C08F 610

Patent

active

052984311

ABSTRACT:
This invention relates to a multi-step process for isolating a cyclotrimerized isocyanate from mixture containing said cyclotrimerized isocyanate plus an isocyanate oligomer which comprises the steps of: (a) contacting said mixture with a liquid solvent to provide a solvent-containing mixture, (b) extracting said solvent-containing mixture by liquid-liquid extraction to cause said solvent-containing mixture to elute into an extractate and a residue, wherein said extractate is a cyclotrimerized isocyanate that is essentially oligomer-free and is further characterized by having reduced viscosity relative to said solvent-containing mixture, and (c) separating uncyclotrimerized monomer from said extractate to provide a reduced viscosity trimer product that is essentially free of monomer. Also disclosed is the reduced-viscosity product produced by this process.

REFERENCES:
patent: 4220728 (1980-09-01), Kresta et al.
patent: 4265798 (1981-05-01), Mishra
patent: 4324879 (1982-04-01), Bock et al.
patent: 4412073 (1983-10-01), Robin
patent: 4876380 (1989-10-01), Chen et al.
patent: 4963675 (1990-10-01), Robin et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Process for producing low viscosity isocyanate trimers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing low viscosity isocyanate trimers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing low viscosity isocyanate trimers will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-791059

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.